Composites Part A: Applied Science and Manufacturing最新文献_第6页

Structural design and simulation analysis of an integrated composite drive shaft with a variable-thickness membrane disk 带变厚膜盘的综合复合材料传动轴结构设计与仿真分析

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-27 DOI: 10.1016/j.compositesa.2025.109545

Lan Zhang , Weifang Chen , Dan Wang , Junmi Long , Huiyang Nie

In response to the requirements for modern high-speed helicopters, including high-torque capacity, significant angular misalignment compensation, and lightweight design, this paper proposes an integrated composite drive shaft design method incorporating a variable-thickness membrane disk. Firstly, Draw on existing mature ply schemes to undertake the new drive shaft design. Subsequently, by comparing the angular compensation capabilities of rectangular, circular, tapered, and trapezoidal membrane disk configurations, the optimal configuration is selected. The specific dimensional parameters of this configuration are then determined using a co-simulation optimization approach integrating ABAQUS and Isight. On this basis, guided by the principle of equal stress distribution on the membrane disk surface under extreme working conditions, a variable-thickness disk profile is designed by adopting a stepwise discrete ply-drop-off methodology from the inner to the outer region, ensuring the continuity of the primary fibers. Furthermore, finite element analysis is performed to evaluate the strength and modal characteristics of the integrated drive shaft. Experimental validation of its modal and stiffness properties is conducted, and the close agreement between the experimental results and theoretical analyses confirms the effectiveness and feasibility of the proposed design method. The findings of this study can provide a theoretical foundation for the design of drive shafts for high-speed helicopters.

针对现代高速直升机对传动轴大扭矩、角对差补偿显著、轻量化设计的要求，提出了一种含变厚膜盘的复合材料传动轴综合设计方法。首先，借鉴现有成熟的铺层方案进行新的传动轴设计。随后，通过比较矩形、圆形、锥形和梯形膜盘结构的角度补偿能力，选择出最优膜盘结构。然后使用集成ABAQUS和Isight的联合仿真优化方法确定该配置的具体尺寸参数。在此基础上，根据极端工况下膜盘表面应力分布均匀的原理，采用由内到外逐步离散的压降法设计变厚膜盘廓形，保证原纤维的连续性。此外，还进行了有限元分析，以评估集成传动轴的强度和模态特性。对其模态和刚度特性进行了实验验证，实验结果与理论分析结果吻合较好，证实了所提设计方法的有效性和可行性。研究结果可为高速直升机传动轴的设计提供理论依据。

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引用次数: 0

Development of the modified V-notched rail shear test for carbon fiber reinforced composites with multi-scale simulation method considering microscopic failure points 考虑微观破坏点的改进v型缺口轨剪切试验的多尺度模拟方法研究

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-26 DOI: 10.1016/j.compositesa.2025.109535

Gyu-Won Kim , Hyun-Ji Rho , Young-Woo Kim , Jun-Seop Song , Woe Tae Kim , Dong-Hwi Kim , Jong-Whi Park , Hak-Sung Kim

In this study, a modified V-notched rail shear test was developed to evaluate the shear properties of unidirectional and plain-woven carbon fiber reinforced plastics (CFRPs) under pure shear conditions. The test apparatus was specifically designed to address issues of in-plane and out-of-plane rotation in specimens, which are commonly encountered in conventional V-notched rail shear test. Experimental results obtained from the modified V-notched rail shear test were compared with those from three conventional ASTM standard shear tests (the ±45° tensile test, the Iosipescu shear test, and the conventional V-notched rail shear test). Strain distribution on each test specimen was analyzed using digital image correlation to verify the uniformity of the shear strain state. To further validate the modified V-notched rail shear test, an advanced multi-scale finite element analysis model was developed. Unlike traditional approaches, where the failure region was fixed to a single point in the micro-scale, the advanced model identified multiple failure regions through micro-scale analysis. These multiple regions were then incorporated into the macro-scale analysis, resulting in a more accurate representation of damage progression and overall material behavior. By providing precise and reliable shear property measurements, the modified V-notched rail shear test establishes a robust method for CFRP characterization with broad applicability in research and industry.

在本研究中，开发了一种改进的v型缺口轨剪切试验，以评估单向和平编织碳纤维增强塑料（CFRPs）在纯剪切条件下的剪切性能。该试验装置专门设计用于解决常规v型轨剪切试验中常见的试件面内和面外旋转问题。将改进的v型缺口轨剪切试验结果与三种常规ASTM标准剪切试验（±45°拉伸试验、Iosipescu剪切试验和常规v型缺口轨剪切试验）的实验结果进行了比较。利用数字图像相关分析了各试件的应变分布，验证了剪切应变状态的均匀性。为了进一步验证改进的v型缺口轨剪切试验，建立了先进的多尺度有限元分析模型。与传统方法在微观尺度上将破坏区域固定在单个点上不同，该模型通过微观尺度分析识别出多个破坏区域。然后将这些多个区域纳入宏观尺度分析，从而更准确地表示损伤进展和整体材料行为。通过提供精确可靠的剪切性能测量，改进的v型缺口轨剪切试验为碳纤维增强材料的表征建立了一种强大的方法，在研究和工业中具有广泛的适用性。

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引用次数: 0

Quasi-static compression and dynamic impact of 3D CFRP star-shaped anti-tetra-missing rib auxetic structures with enhanced stiffness 增强刚度三维CFRP星形抗四缺筋结构的准静态压缩与动态冲击

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-23 DOI: 10.1016/j.compositesa.2025.109521

Keda Li , Mabel Mei Po Ho , Hong Hu

This study proposes a novel 3D star-shaped anti-tetra-missing-rib (S-ATMR) auxetic lattice fabricated from carbon fiber-reinforced polymer (CFRP) laminates to enhance load-bearing and energy-absorbing performance. Three configurations with interior angles of 140°, 160°, and 180° are designed to investigate the influence of reinforcement truss geometry on mechanical behavior. The lattices are fabricated by orthogonally interlocking engraved 2D CFRP sheets and tested under quasi-static compression and low-velocity impact, supported by finite element (FE) simulations based on the Hashin failure model. Results reveal that increasing the interior angle promotes a transition from bending- to stretch-dominated deformation, leading to higher stiffness and negative Poisson’s ratio (NPR). The S-ATMR-180 configuration exhibits a compressive modulus over an order of magnitude greater than comparable 3D auxetic lattices and demonstrates superior energy absorption and recoverability under dynamic impact. This work establishes a new stretch-dominated composite auxetic architecture featuring lightweight design, high specific stiffness, and improved impact resistance, offering guidance for advanced structural applications.

本研究提出了一种由碳纤维增强聚合物（CFRP）层叠板制成的新型三维星形抗四缺肋（S-ATMR）缺失晶格，以提高承载和吸能性能。设计了三种内角分别为140°、160°和180°的结构，研究了钢筋桁架几何形状对力学性能的影响。采用正交互锁雕刻二维CFRP片材制作网格，在准静态压缩和低速冲击下进行测试，并基于Hashin破坏模型进行有限元模拟。结果表明，增加内角可促进由弯曲主导向拉伸主导的变形转变，从而导致更高的刚度和负泊松比（NPR）。S-ATMR-180结构的压缩模量比类似的3D减振晶格大一个数量级，并且在动态冲击下具有优越的能量吸收和恢复能力。这项工作建立了一种新型的拉伸为主的复合材料减振结构，具有轻量化设计、高比刚度和增强的抗冲击性，为先进的结构应用提供了指导。

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引用次数: 0

Evaluation of nanodiamond and short glass fiber-reinforced dental composites: Mechanical, optical, and biological characterization 纳米金刚石和短玻璃纤维增强牙科复合材料的评价：机械、光学和生物学表征

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-22 DOI: 10.1016/j.compositesa.2025.109540

Negar Mahmoudi Meimand , Junjing Zhang , Lamia Singer , Honghao Gong , Minji Kwon , Michael Francis Burrow , Zhiqin Chu , James Kit Hon Tsoi , Kiho Cho

Despite advancements in dental resin composites, issues such as bulk fracture and recurrent caries continue to hinder their performance and durability. This study evaluates a novel composite incorporating nanodiamonds and short S-glass fibers, aimed at enhancing mechanical and antibacterial properties while maintaining aesthetics. Four composite groups were prepared: ND-Sgf (50 wt% resin, 10 wt% S-glass fibers, 40 wt% glass particles, 0.2 wt% nanodiamonds, 1.0 wt% photoinitiators), ND (without S-glass fibers), Sgf (without nanodiamonds), and a control (without nanodiamonds or fibers). Key properties, including degree of conversion, flexural strength (FS), flexural modulus (FM), surface roughness, hardness, shade, transparency, and antibacterial activity against Streptococcus mutans were analyzed by one-way analysis of variance, followed by multiple comparisons (SPSS software (α = 0.05))The ND-Sgf group exhibited significantly higher flexural modulus (7.27 ± 0.33 GPa) and Vickers hardness (32.66 ± 0.99 VH) than their respective controls. Additionally, after 24 h, ND-Sgf showed significantly lower S. mutans adhesion (122 ± 46.92 × 10⁴ CFU/ml) compared to the Sgf group (386.6 ± 115.16 × 10⁴ CFU/ml, p = 0.013), with cell viability comparable to controls (p > 0.05). The BPA-free dental resin composites reinforced by surface-modified glass fibers and nanodiamonds demonstrated marked improvements in mechanical, antibacterial, and aesthetic properties, indicating promising potential for advanced dental restorative applications.

尽管牙科树脂复合材料取得了进步，但诸如大块骨折和复发性龋齿等问题继续阻碍其性能和耐用性。本研究评估了一种结合纳米金刚石和短s -玻璃纤维的新型复合材料，旨在提高机械和抗菌性能，同时保持美观。制备了四种复合材料组：ND-Sgf （50 wt%树脂，10 wt% s -玻璃纤维，40 wt%玻璃颗粒，0.2 wt%纳米金刚石，1.0 wt%光引发剂），ND（不含s -玻璃纤维），Sgf（不含纳米金刚石）和对照（不含纳米金刚石或纤维）。采用单因素方差分析、SPSS软件（α = 0.05）对转化度、抗弯强度（FS）、抗弯模量（FM）、表面粗糙度、硬度、色度、透明度和对变形链球菌的抗菌活性进行分析。ND-Sgf组的抗弯模量（7.27±0.33 GPa）和维氏硬度（32.66±0.99 VH）显著高于对照组。24 h后，ND-Sgf组的S. mutans黏附率（122±46.92 × 104 CFU/ml）显著低于Sgf组（386.6±115.16 × 104 CFU/ml, p = 0.013），细胞活力与对照组相当（p > 0.05）。由表面改性玻璃纤维和纳米金刚石增强的不含双酚a的牙科树脂复合材料在机械、抗菌和美学性能方面有显著改善，表明其在高级牙科修复材料中的应用前景广阔。

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引用次数: 0

Constructing c-Al2O3@PDA dual interlayers in Al/PVDF composites towards synergistic enhancement of dielectric properties and thermal conductivity 在Al/PVDF复合材料中构建c-Al2O3@PDA双中间层以协同增强介电性能和导热性

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-22 DOI: 10.1016/j.compositesa.2025.109541

Jiahuan Zhao , Guangheng Wang , Xiaolong Chen , Weiwei Li , Jing Zuo , Shaolong Zhong , Wenying Zhou

Percolating polymer composites present a high dielectric constant (ε) near the percolation threshold, but the unwished high dielectric loss and low breakdown strength (E_b) along with poor thermal conductivity (TC) inevitably accompanied badly hinder their applications. To achieve concurrently high ε, E_b and TC but low loss in raw aluminum (Al)/polyvinylidene fluoride (PVDF), the self-passivated amorphous alumina (Al₂O₃) shell onto Al core was first converted to crystalline one (c-Al₂O₃) and then encapsulated with a layer of polydopamine (PDA), and the c-Al₂O₃@PDA dual-shell’ impacts on dielectric properties and TC of PVDF composites were investigated. The results show that the Al@c-Al₂O₃@PDA/PVDF showcase simultaneously elevated ε, E_b and TC but much suppressed loss, which cannot be realized in pristine Al/PVDF composites. The multiple enhancements originate from three aspects: 1) the double-shell introduces additional interfaces and induces multiple intra and inter particles polarizations subsequently leading to evidently enhanced ε; 2) the dual-shell not only generates charge traps and impede carrier migration but also mitigate electric field distortion, resulting in low loss and high E_b; 3) the crystalline alumina shell alleviates phonon impedance mismatches and phonon state density and promotes interfacial phonon transport thus bolstering the TC. So, combining the c-Al₂O₃ shell with PDA coating achieves synergistic optimization of high ε, E_b and TC coupled with low loss in the Al@c-Al₂O₃@PDA/PVDF composites, emerging appealing applications in electrical insulating fields.

渗透聚合物复合材料在渗透阈值附近具有较高的介电常数（ε），但其高介电损耗和低击穿强度（Eb）以及较差的导热系数（TC）不可避免地严重阻碍了其应用。为了在原铝/聚偏氟乙烯（PVDF）中同时获得高ε、Eb和TC和低损耗，首先将铝核上自钝化的非晶氧化铝（Al2O3）壳转化为结晶氧化铝（c-Al2O3），然后包覆一层聚多巴胺（PDA），研究c-Al2O3@PDA双壳对PVDF复合材料介电性能和TC的影响。结果表明，Al@c-Al2O3@PDA/PVDF同时提高了ε、Eb和TC，但大大抑制了损耗，这在原始Al/PVDF复合材料中是无法实现的。多重增强源于三个方面：1)双壳层引入了额外的界面，引起了粒子内和粒子间的多重极化，导致ε明显增强；2)双壳层不仅能产生电荷陷阱和阻碍载流子迁移，还能减轻电场畸变，从而实现低损耗和高Eb；3)晶体氧化铝壳减轻声子阻抗失配和声子态密度，促进界面声子输运，从而增强TC。因此，将c-Al2O3外壳与PDA涂层相结合，在Al@c-Al2O3@PDA/PVDF复合材料中实现了高ε、高Eb、高TC和低损耗的协同优化，在电绝缘领域出现了具有吸引力的应用前景。

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引用次数: 0

Multifunctional Phase-Change-Material-Based composites with 3D BN/SiO2 networks for enhanced thermal management 多功能相变材料基复合材料与3D BN/SiO2网络增强热管理

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-22 DOI: 10.1016/j.compositesa.2025.109539

Oju Kwon , Subin Lee , Jaekyung Lee , Jaeyeon Kim , Dabin Park , Jooheon Kim

Phase-change materials (PCMs) offer high latent heat and reversible solid–liquid transitions, making them promising candidates for thermal energy storage and management. However, their practical use is hindered by low thermal conductivity, leakage during melting, and poor flame retardancy. In this study, we develop a multifunctional PCM composite comprising a xylitol-grafted epoxy matrix (XYBPA) and a three-dimensional (3D) thermally conductive scaffold formed from hydroxylated boron nitride (BN) plates and SiO₂ nanofibers. The 3D filler network was constructed via thermal gelation and freeze-drying using curdlan and alkyl polyglucoside, and subsequently infiltrated with the XYBPA matrix. The covalent bonding between xylitol and the epoxy backbone suppressed leakage and enabled stable phase transitions. The optimized composite with a BN:SiO₂ ratio of 3:1 and 60 wt% filler content achieved a through-plane thermal conductivity of 3.81 W/m·K (1632 % improvement over the neat matrix), while retaining a latent heat of about 60 J/g. The composite exhibited negligible leakage up to 390 K, passed UL-94 V-0 flammability standards with a limiting oxygen index of 31.1 %, and showed enhanced mechanical strength (13.7 MPa) and high electrical resistivity (>10⁹ Ω·cm). These results demonstrate that the synergistic integration of chemically functionalized fillers and covalently bonded PCM matrices offers an effective strategy for simultaneously addressing thermal, mechanical, electrical, and fire safety requirements in PCM-based systems.

相变材料（PCMs）具有高潜热和可逆的固液转变，使其成为热能储存和管理的有希望的候选者。然而，它们的实际应用受到导热系数低、熔化时泄漏和阻燃性差的阻碍。在这项研究中，我们开发了一种多功能的PCM复合材料，包括木糖醇接枝环氧基（XYBPA）和由羟基化氮化硼（BN）板和二氧化硅纳米纤维形成的三维（3D）导热支架。通过热凝胶和烷基聚葡萄糖苷的冷冻干燥构建三维填充网络，然后用XYBPA基质浸润。木糖醇和环氧主链之间的共价键抑制了泄漏并实现了稳定的相变。优化后的BN:SiO2比为3:1，填料含量为60%的复合材料的通平面导热系数为3.81 W/m·K（比纯基体提高1632%），潜热约为60 J/g。该复合材料在高达390 K时泄漏可忽略，通过UL-94 V-0可燃性标准，极限氧指数为31.1%，机械强度（13.7 MPa）增强，电阻率（>109 Ω·cm）高。这些结果表明，化学功能化填料和共价键合PCM矩阵的协同集成为同时满足基于PCM的系统的热、机械、电气和消防安全要求提供了一种有效的策略。

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引用次数: 0

Effect of pre-bond moisture on mode I interlaminar fracture toughness of co-bonded interlayer toughened epoxy composites 粘结前水分对共粘结层间增韧环氧复合材料I型断裂韧性的影响

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-22 DOI: 10.1016/j.compositesa.2025.109542

Shanteng Wang , Bingye Li , Linlin Gao , Lingcong Gu , Guocai Li , Xiaofei Wang , Jiahao Zhai , Penghua He , Weiping Liu , Cheng Chen

Co-bonding of interlayer-toughened epoxy composites is essential for manufacturing wing skin of wide-body aircraft. However, excessive moisture absorption in spars during transportation and storage severely compromises mechanical properties of co-bonded joints. This study investigates effects of pre-bond moisture and drying treatments on Mode I interlaminar fracture toughness (G_Ic) of co-bonded interlayer-toughened laminates. Results show that G_Ic decreases progressively with increasing pre-moisture, showing reductions of 6.9%, 9.4%, 15.9%, and 15.5% at 0.22%, 0.44%, 0.60%, and 0.83% moisture contents, respectively, compared to the dry substrate. This is primarily due to the failure transition from prepreg-adhesive interface for dry substrate to cohesive failure within the adhesive film as the pre-bond moisture of substrate increases. Differential scanning calorimetry demonstrates that moisture-induced plasticization of adhesive film lowers glass transition temperature under high-pressure curing and weaken the adhesive film. Moreover, the plasticization of adhesive film is partially reversible by post-cure drying treatment. Additionally, pre-bond moisture causes brittle failure of thermoplastic fiber within adhesive film. This research provides essential theoretical insights for pre-bond moisture control for manufacturing large-scale wing skin by co-bonding.

层间增韧环氧复合材料的共粘接是制造宽体飞机机翼蒙皮的关键。然而，在运输和储存过程中，梁的过度吸湿严重影响了共粘结接头的力学性能。研究了粘结前水分和干燥处理对共粘结层间增韧层压板I型断裂韧性的影响。结果表明，随着预含水率的增加，GIc逐渐降低，在0.22%、0.44%、0.60%和0.83%的预含水率下，与干燥基质相比，GIc分别降低了6.9%、9.4%、15.9%和15.5%。这主要是由于随着基材粘合前水分的增加，从干燥基材的预浸料-粘合剂界面失效转变为胶膜内的粘合失效。差示扫描量热法表明，高压固化下胶膜的湿致塑化降低了胶膜的玻璃化转变温度，使胶膜变弱。此外，胶膜的塑化是部分可逆的固化后干燥处理。此外，粘合前的水分会导致胶膜内热塑性纤维的脆性破坏。该研究为通过共粘接制造大型机翼蒙皮的预粘接水分控制提供了重要的理论见解。

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引用次数: 0

Bamboo-inspired density gradient design confers favorable strength-toughness matching in aluminum foam sandwich 竹子的密度梯度设计使泡沫铝夹层具有良好的强度-韧性匹配

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-22 DOI: 10.1016/j.compositesa.2025.109538

Shizhong Zhang , Xudong Yin , Jiucheng Zhao , Shunbo Wang , Yan Liu , Liya Tian , Zhaoxin Wang , Jiyu Tian

The aluminum foam sandwich (AFS) structure exhibiting both high strength and toughness represents a highly sought-after material in engineering applications. However, its design remains challenging. Inspired by the gradient distribution of natural bamboo fibers, we developed a density-graded AFS through multi-scale assembly strategies. The volume fraction of the face sheets exhibited an exponential increase from 13 % to 45.7 % along the thickness direction. Quasi-static three-point bending tests demonstrated specific bending strength and specific energy absorption values of 28.2 × 10³ m²/s² and 4.28 × 10³ J/kg, respectively, outperforming most reported counterparts. Compared to non-gradient controls, the ultimate strain and ultimate strain energy were enhanced by 43.4 % and 87.3 % respectively. Digital Image Correlation (DIC) analysis and fracture characterization revealed that the bamboo-inspired gradient architecture facilitates uniform longitudinal strain transfer while mitigating strain localization. Additionally, interlaminar shear strains were significantly reduced, effectively suppressing delamination. This structural innovation shifted the failure mode from extensive interlaminar delamination to core shear-dominated fracture, thereby enhancing overall mechanical performance. The present work offers a straightforward and effective strategy for designing high-performance AFS and similar layered composites.

泡沫铝夹层（AFS）结构具有高强度和韧性，是工程应用中备受追捧的材料。然而，它的设计仍然具有挑战性。受天然竹纤维梯度分布的启发，我们通过多尺度组装策略开发了密度梯度的AFS。面板的体积分数沿厚度方向呈指数增长，从13%增加到45.7%。准静态三点弯曲试验表明，比弯曲强度和比能量吸收值分别为28.2 × 103 m2/s2和4.28 × 103 J/kg，优于大多数同类报道。与非梯度对照相比，极限应变和极限应变能分别提高了43.4%和87.3%。数字图像相关（DIC）分析和断口表征表明，竹子启发的梯度结构有助于均匀的纵向应变传递，同时减轻应变局部化。此外，层间剪切应变显著降低，有效抑制分层。这种结构创新将破坏模式从广泛的层间分层转变为岩心剪切为主的破裂，从而提高了整体力学性能。本工作为设计高性能AFS和类似的层状复合材料提供了一种简单有效的策略。

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引用次数: 0

High-temperature mechanical performance and fire retardancy of polysilazane/epoxy-based basalt fiber reinforced polymer laminates 聚硅氮烷/环氧基玄武岩纤维增强聚合物层压板的高温力学性能和阻燃性

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-21 DOI: 10.1016/j.compositesa.2025.109536

Jianxun Liu , Hirwa Nshuti Roger , Xingchen Li , Zhengjie Zhu , Husam A.R. Husam , Yuxin Zhou , Zhishen Wu

Epoxy resin’s adhesion and mechanical properties make it the preferred FRP matrix, but its poor flame retardancy and thermal stability limit its use in fire-critical applications. present work integrated polysilazane (PSZ) into epoxy resin matrices to fabricate basalt fiber reinforced polymer (BFRP) laminates aimed at enhancing high-temperature mechanical stability and flame retardancy. Laminates with varying PSZ/epoxy ratios were produced. Comprehensive characterization included uniaxial tensile testing before and after temperature exposure, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), Fourier transform infrared Spectroscopy (FTIR), vertical-burn, cone calorimetry, scanning electron microscopy (SEM), and post-fire low-velocity impact (LVI) testing. The 1:1 PSZ/epoxy(B-50EP50P) retained 115.7 % and 76.7 % of its original tensile strength after exposure to 200 ℃ and 400 ℃, respectively, outperforming neat epoxy (B-100EP). TGA demonstrated that PSZ-rich laminates maintained ≥ 90 % mass at 500 ℃. DMA revealed that storage modulus increases above 200 ℃ for PSZ-contained composites, indicating the in situ formation of a ceramic-like network. FTIR confirmed PSZ-containing laminates maintained spectral integrity after thermal exposure due to partial ceramization, while the neat epoxy laminate exhibited significant bond degradation. Vertical burn tests achieved self-extinguishment in under 10 s for pure PSZ (B-100P) and 15 s for B-50EP50P, with minimal char length. SEM confirmed the formation of a cohesive, ceramic-like char that protects the underlying fibers after surface burning. Post-fire LVI demonstrated that B-50EP50P exhibited elastic rebound at 10 J and a full-penetration threshold of 20 J, outperforming neat epoxy. PSZ/epoxy-based modified BFRP composites show promise for high-temperature fire retardancy applications.

环氧树脂的附着力和机械性能使其成为首选的FRP基体，但其较差的阻燃性和热稳定性限制了其在防火应用中的应用。本研究将聚硅氮烷（PSZ）加入环氧树脂基体中制备玄武岩纤维增强聚合物（BFRP）复合材料，以提高其高温力学稳定性和阻燃性。制备了不同PSZ/环氧树脂比例的层压板。综合表征包括温度暴露前后的单轴拉伸测试、热重分析（TGA）、动态力学分析（DMA）、傅里叶变换红外光谱（FTIR）、垂直燃烧、锥量热法、扫描电镜（SEM）和火灾后低速撞击（LVI）测试。经200℃和400℃处理后，PSZ/环氧树脂（B-50EP50P）的抗拉强度分别保持了115.7%和76.7%，优于纯环氧树脂（B-100EP）。热重分析表明，在500℃时，富psz层压板的质量保持≥90%。DMA显示，在200℃以上，含psz的复合材料的存储模量增加，表明原位形成了类似陶瓷的网络。FTIR证实含有psz的层叠板在热暴露后由于部分陶化保持了光谱完整性，而整齐的环氧层叠板表现出明显的键降解。垂直燃烧测试在10秒内实现了纯PSZ （B-100P）和15秒内实现了B-50EP50P的自熄，具有最小的字符长度。扫描电镜证实，在表面燃烧后，形成了一种具有凝聚力的陶瓷状炭，可以保护下面的纤维。燃烧后LVI表明，B-50EP50P在10 J时表现出弹性回弹，在20 J时表现出全穿透阈值，优于纯环氧树脂。PSZ/环氧基改性BFRP复合材料具有良好的高温阻燃应用前景。

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引用次数: 0

Effect of service temperatures on the interfacial bonding properties of PA11–CFRP in Type IV high–pressure hydrogen storage cylinders with different surface treatments 使用温度对不同表面处理的IV型高压储氢瓶中PA11-CFRP界面结合性能的影响

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-20 DOI: 10.1016/j.compositesa.2025.109537

Liangliang Qi , Keqing Wang , Yuhang He , Bowen Gong , Zhuangzhuang Cao , Peiyu Hu , Jianfeng Shi

One of the major challenges for Type IV high–pressure hydrogen storage cylinders is the susceptibility of the plastic liner to collapse, where the interfacial properties between the liner and outer carbon fibre reinforced polymer (CFRP) play a critical role in preventing the liner from becoming unstable. However, variations in the service environment, particularly temperature fluctuations, can significantly compromise the stability of the interface between the liner and CFRP, thereby weakening their coordinated deformation during depressurization. To address this issue, nanosecond pulsed laser, atmospheric–pressure plasma, and their synergistic treatment were employed to modify the polyamide 11 (PA11) surface, and the effects of service temperature on the interfacial bonding properties of PA11–CFRP with different surface treatments were systematically investigated. The results revealed that the interfacial bonding properties were highly sensitive to temperature: under elevated temperatures, interface stiffness decreased while toughness increased, whereas at low temperatures, stiffness increased but toughness was insufficient. With increasing cycles of alternating thermal cycling, the interfacial bonding strength gradually deteriorated; untreated specimens approached failure after 1000 cycles, while synergistically treated specimens exhibited the strongest durability. Combined with microscopic analysis, the synergistic treatment integrated laser–induced roughening with plasma–induced activation, providing a dual enhancement mechanism of mechanical interlocking and chemical bonding. It inhibits excessive molecular relaxation and alleviates residual stress accumulation, thereby significantly improving interfacial durability and reliability under thermal environments. This study provides theoretical insights into the interfacial enhancement of Type IV hydrogen storage cylinders under service temperature and offers valuable guidance for improving their safety and long–term reliability.

IV型高压储氢瓶面临的主要挑战之一是塑料衬垫的易感性，其中衬垫与外部碳纤维增强聚合物（CFRP）之间的界面性能在防止衬垫变得不稳定方面起着关键作用。然而，使用环境的变化，特别是温度的波动，会严重损害衬板和碳纤维布之间界面的稳定性，从而削弱它们在减压过程中的协调变形。为了解决这一问题，采用纳秒脉冲激光、常压等离子体及其协同处理方法对PA11表面进行改性，系统研究了不同表面处理温度对PA11 - cfrp界面键合性能的影响。结果表明：界面结合性能对温度高度敏感，高温下界面刚度减小，韧性增加；低温下界面刚度增大，韧性不足；随着交替热循环次数的增加，界面结合强度逐渐降低；未经处理的试件在1000次循环后接近破坏，而协同处理的试件表现出最强的耐久性。结合显微分析，协同处理将激光诱导粗化与等离子体诱导活化结合在一起，提供了机械联锁和化学结合的双重增强机制。它抑制了过度的分子松弛，减轻了残余应力的积累，从而显著提高了界面在热环境下的耐久性和可靠性。该研究为IV型储氢气瓶在使用温度下的界面增强提供了理论见解，为提高其安全性和长期可靠性提供了有价值的指导。

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引用次数: 0